The Bicycle Cellar is a bike shop/membership facility that allows bike commuters to come in, lock their bike, shower, and head over to work in the nearby area.
My review is for the bike shop, not the commuter facility. I initially heard of this place via google as I was looking for a bike. There isn't a huge selection of bikes here, but you'll find some good used bikes, and some new ones in the store.
I was very impressed with the honesty and knowledge of the staff here. The most striking part is that they don't try to push a sale. If they don't have whats best for you, they'll recommend someone else.
In my case, i ended up renting two bikes to get a feel for bike commuting - the rentals were ~30/day, but that included helmets, panniers and whatever else was needed. The second bike I tried, I loved. I ended up buying that model (not that exact bike) from them.
They made great recommendations on tires, accessories, lights etc, at each stage offering me various options, and alternate ideas in case i didn't or couldn't afford purchase something. My point is that their attitude to the customer was - if you don't want it, we understand. but here's why it makes sense to have one. you can buy it from here, and we'll give you discounts, or you can shop around as well..
all in all, some very knowledgeable folks in there, who love bikes, and really focus on customers. Highly recommended